Weather stripping



' Oct. 14, 1941. E. c. SWANSON I 2,259,008

I v WEATHERSTRIPPING" I Filed Oct. 22, 1938 2 Sheets-Sheet 1 PatentedOct. 14, 1941 WEATHER STRIPPIN G Earl C. Swanson, Bayport, Minn,assignor to Andersen Corporation, Bayport, Minn, a. cor-' poration ofMinnesota or ies Application October 22, 1938, Serial No. 236,475

4 Claims. (Cl. -52) My invention relates to improvements in weatherstripping for windows of the sliding sash type generally called doublehung windows.

My invention aims to provide a more satisfactory construction than anyheretofore devised insofar as I am familiar with the art. Broadlystated, my invention has for its object to provide a simple andeffective weather stripping which combines many of the advantages ofother structures heretofore devised but without their disadvantages.

My invention contemplates essentially a unitary weather strip soconstructed and arranged that one part will interlock with the sash andanother bear by spring pressure against the sash stile.

-A further object of my invention is to provide a weather strip whichmay be easily installed in the window frame and which will permit readyinsertion of the sashes into, and their removalfrom, the frame.

Still another object of my invention is to provide a two-piece partingstop for a window frame, each piece having secured to it the weatherstripping for one of the sashes.

A specific object of the invention is to provide a weather strip for theside of a sliding sash comprising a channel-shaped member adapted tocover the parting stop and having a wing member extending laterallytherefrom which is provided at its extremity with a rib adapted tointerlock in a groove in the sash stile. Together with this part of thestructure, I also provide a spring tension member adapted to bearagainst the sash stile.

Further objects of the invention and the advantages thereof will be morefully brought out as the description proceeds.

In the accompanying drawings I have illustrated a practical embodimentof my invention. For clearness and to enable those skilled in the art tomake and use my invention I have shown the same in great detail both asto the construction of the window frame and its sashes as well as theweather stripping. But it is to be understood that I do not limit myselfto the precise details of construction illustrated. This is particularlytrue with respect to the window frame and its sashes. It is to beunderstood, then, that my invention is not to be limited otherwise thanas set forth in the appended claims.

In the drawings:

Fig. 1 is a front elevation of a double hun window embodying myinvention;

Fig. 2 is a horizontal sectional view on a larger scale and taken on theline 2-2 of Fig. 1;

Fig. 3 is an enlarged fragmentary sectional view of the upper sash takenon the line 3-3 of Fig. 1;

Fig. 4 is an enlarged fragmentary sectional view of the lower sash takenon the line 4-4 of Fig. I;

Fig. 5 is a. fragmentary elevation of a side jamb showing my two-pieceparting stop with the weather strips in place and showing also theuse ofa check rail pad;

Fig. 6 is a fragmentary side elevation showing the check rail padillustrated in Fig. 5;

Fig. '7 is an enlarged fragmentary Vertical section through the top railof the upper sash taken on the line 1-1 of Fig. 1 and illustrating thehead weather strip; and

Fig. 8 is a fragmentary vertical sectional view like Fig. '7 showing amodification consisting in the use of a subparting stop provided with agroove to receive the weather stripped parting stop instead of formingthe groove directly in the jambs as shown in the other figures.

Referring now to the drawings, I have illustrated in Fig. 1 a windowembodying my invention as the same will appear to an observer standingoutside and in front of the house. The window comprises an upper sash l8and a lower sash l I which are mounted for sliding movement in a framepresently to be described.

The upper or outer sash 10 includes a top rail I2, a meeting rail !3 andside rails or stiles l4 The lower or inner sash H has a check rail ormeeting rail l6, bottom rail I1 and side rails or stiles l8 and I9.

Each of the sashes may be divided into any desired number of light areasby the use of suitable muntin bars 20.

As seen from the outside, the window includes outer casing members 2i, asill 22 and, if desired, a water drip' 23.

Upon the inside of the window I provide the usual inner stop 24 andinside casing or trim 25.

I have also provided the customary stool 26.

The features thus far described are more or less standard features ofwindow construction to which I make no claim in this application. Thedescription of them is herewith included for the sake of completeness ofdisclosure only.

As heretofore stated, each of the sashes is mounted for vertical slidingmovement in the window frame. The said frame comprises a head jamb (notshown), side jambs 28 and 30 and the sill 22 heretofore mentioned.

The frame also includes outside stops or blind stops 3| and 32 and ahead blind stop (not shown).

It will be understood that the channels in which the sashes slide areformed by the side jambs, the inside stops 24 and the outer stops orblind stops 3| and 32, together with a parting stop which will now bedescribed.

In window frames as heretofore constructed, the side and head jambs areprovided with what is generally called a parting stop which forms oneside of the channels in which each of the sashes slides. In general,such parting stops as heretofore used comprise a single unitary piece ofmaterial such as a wood strip which is secured to its jamb in such a Wayas to define a channel or space on each side of it.

According to my invention, the parting stops for the side jambs are madein two pieces designated 36 and 31, the former being the upper half andthe latter, the lower half. The parting stop 38 for the head of theframe is made in a single piece.

As will be seen particularly in Figs. 3, 4 and '7, the said partingstops are set into very shallow grooves 39 in their respective jambs.The reason for making these grooves very shallow will be more fullybrought out when I come to describe the insertion of the sashes into theframe.

Instead of forming this very shallow groove for the parting stopsdirectly in the jambs, I

may provide a sub-parting stop 40 as particularly shown in Fig. 8. Thissub-parting stop may be provided with a shallow rabbet 4| into which theparting stop may be set.

I will proceed now to describe the construc-- tion of the Weatherstripping at the sides of the frame. Considering, first, the upper sashas particularly illustrated in Fig. 3. I have secured to the halfparting stop 36 a metal strip 45 which completely covers the partingstop and has a portion 46 extending laterally therefrom and is bentagain to form a rib 4'! which is adapted to interlock with the side railor stile of the sash by entering a groove 48 formed therein. The weatherstrip may be of any suitable metal but for practical purposes should benon-corroding such as aluminum, bronze or zinc. Furthermore, the portionof the weather strip thus far described should be made of sufiicientlyheavy gauge metal to lend it substantial rigidity so that it will not bedeformed in use. Metal of 8 or 9 gauge (.016" or .018") has been foundin practice to satisfy all the requirements.

The strip 45 which is thus formed to completely surround and cover theparting stop is secured to the latter by means of suitable flat headscrews 49 which also serve the purpose of securing the parting stop tothe jamb. In practice these screws should also be made of non-corrodingmetal such as aluminum or bronze.

In addition to the interlocking weather strip thus far described, myinvention includes also the use of a spring tension member arranged tobear against the side rails or stiles of the sash. This spring tensionmember is indicated in Fig. 3 by the reference character 50 andcomprises a relatively thin spring metal strip which is secured to therib 4'! by inserting it in the space between the two parts of theheavier strip which form the rib 41. sllient member 50 is also made ofnon-corroding metal such as aluminum or bronze. In order to prevent rawor sharp edges, the exposed edge of the strip 50 is suitably hemmed, asat It is to be noted that the spring member 50 is This lighter and,therefore, more resecured to the rib 41 so that its free edge extendstoward the parting stop 36. By so arranging the member the greatestspring pressure is exerted against the sash stile at the point which isnearest the parting stop and thus eliminates any chance of verticalleakage of air or dust upwards along the sash.

The weather stripping for the lower sash is constructed in substantiallythe same manner as that for the upper sash. The details of constructionare shown particularly in Fig. 4 in which the parting stop 3'! is shownto be covered by the metal weather strip which has a portion 56extending laterally therefrom and which, in turn, is bent at its remoteend to form the rib 51 which is located in the groove 58 of the sashstile. Here, again, I have provided a spring tension member 59 which issecured in the rib 51 and bears with its greatest pressure against thatpart of the sash stile which is nearest the parting stop 31.

As will be seen from Fig. 5, the strips 45 and 55 and the parting stopsto which they are secured are so cut as to form a mitre joint, as at 60.

Thus, by looking at Fig. 5, it will be seen that the weather strippingfor the sides of the sashes comprises in each instance a channel-shapedmember which covers the parting stop and which has extending laterallytherefrom a wing-like member provided at its extreme end with a rib forinterlocking engagement with the sash stile. And in addition to theforegoing, there is provided a spring tension member for bearing againstthe stile.

To complete the description of the weather stripping at the sides, Ialso refer to the use of a check rail pad 6| shown in detail in Figs. 5and 6. This pad comprises a thin resilient metal member such as aluminumor bronze bent into suitable shape to extend away from the parting stopand covering an inner filler member 62 of felt or other suitablecompressible material. The check rail pad is secured to the parting stopby any suitable fastening means such as nails 63. As is well understoodin the art, such check rail pads are used in order to make a tight jointbetween the ends of the check rails of the sashes and the parting stop.

I will now describe the weather stripping at the head of the window andwhich is illustrated in detail in Fig. 7. There it will be seen that theparting stop 38 is covered with a weather strip 65 so shaped as tosubstantially completely surround the parting stop and having a portion66 extending rearwardly therefrom which, in turn, is bent over at itsextremity to form a rib 61 which engages in a groove 68 formed in thetop rail l2 of the upper sash. This strip 65 will be made of the samekind and gauge of metal as the strips 45 and 55 heretofore described.

In connection with the head weather strip it is neither necessary nordesirable to use a spring tension member. Such a member would have thetendency to push the upper sash downward in the frame or if made topress against the face of th top rail l2 would tend to bind the sash inclosed position.

The sashes may be counterbalanced by suitable weights 1B which areconnected to the sashes by sash cords, or chains, trained about theusual pulleys (not shown). Of course, any other method ofcounterbalancing may be employed as this feature has nothing to do withmy weather stripping invention.

It will, of course, be apparent that no paressence ticular difficultywill be encountered in installing the Weather stripping for the head,the sill, and the check rails. To install the weather stripping for thesides, the two halves of the parting stop are inserted into the groovein the jamb, or the groove in the sub-parting stop, on one side of theframe, it being understood that the weather strip is attached to eachhalf of the parting stop. It is necessary only to drive a very fewscrews, usually only three, for each half of the parting stop. The uppersash is now inserted and the parting stop for the upper half of theopposite side is put in place with the upper sash at the bottom of theopening. This is done by inserting the lower end of the last mentionedparting stop in its proper place and following through by pressing thetop end into place and then fastening with the screws. To install thelower sash, it is first seated into the side where the parting stop hasalready been applied and then, with the lower sash held about in thecenter of the opening, the lower half of the parting stop for the otherside is fitted into the stile of the sash. Thereupon the sash is swunginto position with the result that the last mentioned parting stop snapsinto place in the groove provided for it. Then the few screws are turnedup. Because of the very shallow groove formed in the jambs, or in thesub-parting stop, it is not difiicult to snap into place the halfparting stop for the lower sash. It will also be noted that in applyingthis last mentioned parting stop with its weather strip, the weatherstrip may be pressed firmly against the stile by compressing the springmember against the wing member. Thus, substantial depth is provided formovement of the sash with the result that only a slight pressure isrequired to seat the parting stop in the groove.

Thus, it will be seen that I have provided weather stripping for awindow which will insure to the greatest extent that it shall be air anddust-tight. The construction is simple and economical and is easilyinstalled and removed by ordinary workmen without the use of specialtools.

I claim as my invention:

1. The combination with a window frame for sliding sashes having aparting stop forming one wall of the channel in which the sashes slide,of a Weatherstrip having a portion fitting over said parting stop, awing member extending laterally from said portion and into said channel,a rib at the outer edge of said wing member entering a groove in a sashstile, and a separate resilient member located between said wing memberand the sash stile pressing against the latter.

2. The combination with a Window frame for sliding sashes having aparting stop forming one wall of the channel in which the sashes slide,of a Weatherstrip having a portion fitting over said parting stop, awing member extending laterally from said portion and into said channel,a rib at the outer edge of said wing member entering a groove in a sashstile, and a separate resilient member located between said Wing memberand the sash stile and pressing against the latter, said resilientmember having a free edge closely adjacent said parting stop.

3. A Weatherstrip for a sliding sash mounted in a frame having a partingstop, comprising a portion secured to said parting stop, a wing memberextending laterally therefrom and provided with a rib adapted to enter agroove in a sash stile, and a separate resilient member of lighter gaugethan said wing member between said parting stop and said rib and adaptedto bear against the side of said sash stile, said resilient memberhaving one edge secured to said rib and the other edge free.

4. A Weatherstrip for a sliding sash mounted in a frame having a partingstop, comprising a portion secured to said parting stop, a wing memberextending laterally therefrom and provided with a rib adapted to enter agroove in a sash stile, and a separate resilient member of lighter gaugethan said wing member between said parting stop and said rib and adaptedto bear against the side of said sash stile, said resilient memberhaving one edge secured to said rib and the other edge free, said freeedge being closely adjacent said parting stop.

EARL C. SWANSON.

